[llvm] AMDGPU: Start selecting buffer fat pointer atomicrmw fmin/fmax (PR #95593)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> LLVM Buildbot has detected a new failure on builder `sanitizer-ppc64be-linux` running on `ppc64be-sanitizer` while building `llvm` at step 2 "annotate".
> 
> Full details are available at: https://lab.llvm.org/buildbot/#/builders/109/builds/274

Not it 

https://github.com/llvm/llvm-project/pull/95593